A special purpose 20 minute fire rated pet door has just been tested approved by UL 10C & CAN/ULC S104 & NFPA 80 - NFPA 252, Standard Methods of Fire Tests of Door Assemblies.
This also falls under IBC Code Chapter: Chapter 7 Fire and Smoke Protection Features.
Firesafe Pet Doors has received this UL approval. This pet door is meant for installation in the attached garage fire wall or 20 minute fire door residential home.
I would appreciate any feedback you may have on this.